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dc.contributor.authorChen, Xuelongen_US
dc.contributor.authorLim, Jacob Song Kiaten_US
dc.contributor.authorLiang, Yen Nanen_US
dc.contributor.authorZhang, Liyingen_US
dc.contributor.authorHu, Xiaoen_US
dc.identifier.citationChen, X., Lim, J. S. K., Liang, Y. N., Zhang, L., & Hu, X. (2019). Large toughening effect in biomimetic geopolymer composites via interface engineered 3D skeleton. ACS Sustainable Chemistry & Engineering, 7(1), 105-110. doi:10.1021/acssuschemeng.8b05090en_US
dc.description.abstractGreen and eco-friendly geopolymers with high thermal/acid resistance represent potential candidates for the replacement of traditional Portland cement in construction, as well as many other applications; however, the intrinsic brittleness and low toughness typical of ceramic hinders widespread adoption of this material in various applications. In this work, we fabricated a new type of geopolymer composites by impregnated with interface engineered 3D skeleton resembling the lotus root structure. Highly porous melamine foam was selected as the 3D skeleton and its interior surface was coated with elastomeric polydimethylsiloxane–polyurea block copolymer. Under loading, the interfacial elastomer could deform and absorb large amount of energy concurrently with crack deflection of melamine foam and delamination of interfaces, thus the toughness was substantially improved as results indicated a transition of fracture behavior from brittle failure mode to a more ductile one. With as low as 2.5 wt % elastomer, the fracture toughness and work of fracture were increased by 258% and 654%, respectively. Owing to the three-dimensional reinforcement preform, the issue with dispersion of reinforcing fillers is circumvented. The obtained geopolymer composites with enhanced toughness allow for applications requiring high load capacity. This strategy of manufacturing composites through 3D skeleton opens new pathway to improving mechanical performance of various brittle materials and material processing techniques.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.relation.ispartofACS Sustainable Chemistry & Engineeringen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
dc.subjectEngineering::Environmental engineeringen_US
dc.titleLarge toughening effect in biomimetic geopolymer composites via interface engineered 3D skeletonen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchTemasek Laboratoriesen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsBioinspired Materialsen_US
dc.description.acknowledgementXuelong Chen acknowledges the scholarship from Nanyang Technological University. Liying Zhang acknowledges the support by the initial research funds for Young Teachers of Donghua University. The authors also acknowledge the funding supported by Nanyang Technological University(NTU) with grant number M4061124 and support from School of Materials Science and Engineering at NTU for this work. The authors thank the Facility for Analysis, Characterization, Testing and Simulation (FACTS) lab where SEM and XRD were performed.en_US
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